miun.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
A Coding Method for UVLC Targeting Efficient Decoder Architecture
Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
2003 (English)In: Proceedings of the 3rd IEEE Internatioal Symposium on Image and Signal Processing and Analysis, Rome, Italy, September, 2003, 2003, p. 428-433Conference paper, Published paper (Refereed)
Abstract [en]

Variable length code (VLC) is used in a large variety of lossless compression applications. A specially designed VLC, called "Universal Variable Length Code" (UVLC), is utilized in the latest video coding standard H.26L under development. In this work we propose a coding method that we call "Alternating Coding" (ALT coding) for UVLC. An efficient UVLC decoder is designed (ALT decoder) on the basis of it. ALT coding facilitates a much easier decoding scheme for UVLC. It frees the decoder from codeword tables and the sizes of the barrel shifters are reduced. The codeword tables and barrel shifters usually occupy the largest portion of the area in the traditional VLC decoders and they are also performance limiting in terms of speed and power consumption. We compare the ALT decoder with one of the most efficient VLC decoders called "VLC decoder using plane separation" (PLS). Our results show that the ALT decoder increases 25% in speed, decreases 41% in size, and consumes 45% power of the PLS decoder.

Place, publisher, year, edition, pages
2003. p. 428-433
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:miun:diva-9365DOI: 10.1109/ISPA.2003.1296935ISI: 000227381500078Scopus ID: 2-s2.0-84946094680ISBN: 953-184-061-X (print)OAI: oai:DiVA.org:miun-9365DiVA, id: diva2:227431
Conference
3rd International Symposium on Image and Signal Processing and Analysis (ISPA), SEP 18-20, 2003, Rome, ITALY
Available from: 2009-07-13 Created: 2009-07-13 Last updated: 2016-09-22Bibliographically approved
In thesis
1. Alternating Coding and its Decoder Architectures for Unary-Prefixed Codes
Open this publication in new window or tab >>Alternating Coding and its Decoder Architectures for Unary-Prefixed Codes
2005 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The entropy coding of high peak, heavy-tailed probability distributions such as the Laplacian, Cauchy, and generalized Gaussian have been a topic of interest because they are able to provide good models for data in many coding systems, especially in image and video coding systems. This thesis studies the entropy coding of such high peak, heavy-tailed probability distributions. By summarizing the encoding of such distributions under the concept “Unary Prefixed Codes” (UPC), the thesis depicts the encoding via a different approach. By extending the concept of UPC, the thesis proposes a universally applicable coding algorithm “Unary Prefixed Huffman” (UPH) that could be applied to both finite and infinite sources. The code set resulting from the UPH algorithm has a coding efficiency which is upper-bounded by entropy + 2 given that the entropy is finite, and is able to provide sub-optimal encoding of the sources studied in the thesis. The thesis also proposes several different variations of UPCs that are simple in structure yet efficient for use for several variations of the high peak, heavy-tailed distributions that are commonly found in image and video coding systems. By applying the concept of the UPC, the thesis further proposes a coding method named the “Alternating Coding” (ALT) method. The ALT coding provides a coding pattern that is different from the conventional method which enables the extraction of special properties of the UPCs. Using the extraction of the special property of the UPCs, decoding could be greatly simplified and parallel decoding could be a possibility. Moreover, for the highly structured UPCs that are widely used in image and video coding systems, the ALT coding enables an error resiliency mechanism to be applied, which helps to improve the error tolerance of these UPC packets to a significant extent. Simulations and actual application results of the ALT coding are discussed in the thesis. By applying the ALT coding, the hardware architecture of the decoder changes accordingly. The ALT decoder is different to the conventional variable length decoders that have been applied in the decoding of UPCs, as it is able to utilize the special properties of the UPCs and thus simplify the decoder architecture. As shown in the thesis, the ALT decoders are smaller in size, faster in speed and consume much less power compared to the conventional decoders. This is particularly true for those highly structured UPCs that are commonly used in image and video coding systems. Actual realizations of several ALT decoders are discussed in the thesis, and comparisons are made to the conventional decoders. The improvements are shown to be very evident.

Place, publisher, year, edition, pages
Sundsvall: Mittuniversitetet, 2005. p. 132
Series
Mid Sweden University doctoral thesis, ISSN 1652-893X ; 1
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:miun:diva-8854 (URN)91-85317-08-X (ISBN)
Public defence
2005-06-08, O111, Åkroken, Sundsvall, 13:15 (English)
Opponent
Supervisors
Available from: 2009-05-06 Created: 2009-05-06 Last updated: 2011-04-19Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full textScopus

Authority records BETA

Xue, ShangOelmann, Bengt

Search in DiVA

By author/editor
Xue, ShangOelmann, Bengt
By organisation
Department of Information Technology and Media
Electrical Engineering, Electronic Engineering, Information Engineering

Search outside of DiVA

GoogleGoogle Scholar

doi
isbn
urn-nbn

Altmetric score

doi
isbn
urn-nbn
Total: 292 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf